EHHA Rev A - Interest Thread
Sep 17, 2010 at 5:26 PM Post #461 of 1,752

runeight

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Quote:
Alex: Please update the schematic to reverse the polarity of the LED on the -30 rail.  Thanks.


I think the schematic is ok, but the lack of + sign on the board is definitely a problem. I'll fix this if we have another board run.
 
So, your measurements mean that all the DC voltages came up properly?
 
 
Sep 17, 2010 at 5:32 PM Post #462 of 1,752

runeight

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Oh, I see what you mean. That LED shouldn't even be there. There is just one LED that goes under the tube but it uses both resistors. I'll fix.
 
Sep 17, 2010 at 5:38 PM Post #465 of 1,752

jdkJake

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Quote:
Oh, I see what you mean. That LED shouldn't even be there. There is just one LED that goes under the tube but it uses both resistors. I'll fix.


No, I mean the PS LED for the -30V rail.
 
The cathode/anode orientation for the schematic posted on the web site needs to be reversed. Otherwise, it does not light up. I initially installed it from the schematic.
 
Of course, the inclusion of polarity markings on the board will go along way. :wink:
 

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